-1\quad OOF:\; x>-\frac{3}{7}\\\\-log_{10}(7x+3)>-1\\\\lg(7x+3)<1,\quad 1=lg10\\\\7x+3<10\\\\7x<7\\\\x<1\\\\Otvet:\; -\frac{3}{7}<x<1" alt="log_{0,1}(7x+3)>-1\quad OOF:\; x>-\frac{3}{7}\\\\-log_{10}(7x+3)>-1\\\\lg(7x+3)<1,\quad 1=lg10\\\\7x+3<10\\\\7x<7\\\\x<1\\\\Otvet:\; -\frac{3}{7}<x<1" align="absmiddle" class="latex-formula">